<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Drag and drop after selecting whole page content</title>
<style type="text/css">
textarea
	{width:300px;
	height:100px;
	margin-top:20px;
	padding:10px;}
</style>
</head>
<body onload="window.getSelection().selectAllChildren(document.querySelector('body'))">
<p>Drag selected text to the textarea. Copy of selection should end up in the textarea once you drop it there.</p>
<p><textarea placeholder="Drop selection here"/></p>
</body>
</html>